\begin{tikzpicture}
    \tkzDefPoints{0/0/B, 3/0/C}
    \tkzDefPointOnCircle[R = center B angle 70  radius 1] \tkzGetPoint{a1}
    \tkzDefPointOnCircle[R = center C angle 130 radius 1] \tkzGetPoint{a2}
    \tkzInterLL(B,a1)(C,a2)  \tkzGetPoint{A}

    \tkzDefLine[bisector](A,C,B) \tkzGetPoint{d}
    \tkzInterLL(A,B)(C,d)        \tkzGetPoint{D}
    \tkzDefLine[parallel=through D](B,C) \tkzGetPoint{e}
    \tkzInterLL(D,e)(A,C)        \tkzGetPoint{E}

    \tkzDrawPolygon(A,B,C)
    \tkzDrawSegments(C,D  D,E)

    \tkzLabelPoints[above](A)
    \tkzLabelPoints[below](B,C)
    \tkzLabelPoints[left](D)
    \tkzLabelPoints[right](E)
\end{tikzpicture}

